Motion picture projector



Oct. 27, 1931. I I c HAYDENv 1,829,482

MOTION PICTURE PROJECTOR Filed Feb. 19, 1927 inml 11$ mlmun g 4 4:lm-llllllr 7 4% Patented Oct. 27, 1931 PATENT OFFICE ABTHU O. HAYDEN, OFBROCKTON', MASSACHUSETTS IOTION PICTURE PROJECTOR Application fledFebruary 19, 1927. Serial No. 169,618.

The invention to be hereinafter described relates to motion pictureprojector apparatus, and more particularly to'an improved film reel andprojector spindle.

The ordinary film reel comprises a pair of circular plates having a hubbetween and secured thereto, said plates having holes in axial alinementadapted to receive the projector spindle. It isessential that the reel 1shall be presented to and mounted on the spindle in a predeterminedosltion so that t e film will feed properly t rough the projector. Theoperator is liable to attempt to present the wrong side of the reel tothe spindle, necessitating withdrawing the reel, re-

versing it and presenting the opposite side to the spindle. One of thepurposes of the present invention is to overcome this objection. Toaccomplish this the reel is so const-ructed that the operator cannotpossibly mount it on the spindle improperly. Another purpose of theinvention is to provide a reel having one of its side lates so formedthat a portion thereof wil engage the end of the spindle and limit thesliding movement of the reel onto the spin- Still another purpose of theinvention is to provide a spindle with a simple, cheap,

efiective device for preventing the reel from slipping off from thespindle.

The character of the invention may be best understood by reference tothe following description of one good form thereof shown in theaccompanying drawing, wherein:

Fig. 1 is a side elevation of the reel;

Fig. 2 on an. enlarged scale is a section through the reel and a portionof the bearing for the spindle, said section being taken on line 2-2 ofFig. 1;

Fig. 3 is a transverse section taken on line 33 of Fig. 2; 7

Fig. 4 is a perspective view of the spindle; and

Fig. 5 is a perspective view of an end portion of the spindle.

Referring to the drawings, the reel shown therein as an embodiment ofthe invention, comprises a pair of circular plates 1 and 3 in havinglarger apertures 5 and smaller aperoutwar tures 7 therein. A hub 9 isbetween and con-' nected to said lates and is adapted to have the filmwoun thereon.

The plate 1 has a cup 11 ressed therefrom at the center thereof, an theplate 3 has a square or flat-sided hole 13 therein in axial alinementwith the cup.

The spindle comprises a portion 15 received by a bearing 17, a square orflat-sided portion 19 and a cylindrical ortion 21. The spindle has arounded an tapered portion 23 at the'juncture of the square portion withthe cylindrical portion. The end 25 of the spindle is slabbed oil toreceive a pulley 27. A ball 29 is in a transverse bore 31.31 the squareportion of the spindle and is pressed by a coil spring 33 so that a partof the ball normally stands out beyond the spindle. After the ball andspring have been inserted into the bore, the portlons of the spindleadjacent opposite ends of the bore may be peened and upset, thereby tosecure the ball and spring in the bore.

When it is desired to mount the reel on the spindle, the reel mustalways be presented to the spindle with the plate 3 foremost, since itis obvious that the spindle cannot pass through the cup. As the reel isslid along the spindle the hole 13 in the plate 3 will be easily guidedby the rounded and tapered portion 23 of the spindle onto the squareportion of the spindle. The engagement of the square portion of thespindle with the square hole in the plate 3 will cause the reel torotate with the spindle. As the reel is slid onto the spindle, the endof the cylin-- drical portion 21 thereof will enter the cup and engagethe bottom thereof, thereby limiting the sliding the movement of thereel onto the spindle. 90

When the plate 3 slides over the spindle, the hole therein will rideover the ball 29 and press the same inwardagainst the resistance of thecoil spring 33, and when the plate 3 has passed the ball, the latterwill be caused by the spring to snap outward and engage the inner faceof the plate 3 and prevent the reel from sliding off from the spindle.

The reel plates 1 and 3 have holes 35 therein near the peripheries ofthe plates, and any pair of the holes of the two plates is adapted toreceive a pin 37 constructed and arran d for securing the free end ofthe film to the reel. This device is shown and claimed in Letters Patentof the United States No. 1,649,470, granted to me November 15, 1927.

By my invention'is provided a simple,

' cheap and useful reel and spindle construction. It will be understoodthat the invention is not limited to the specific embodiment thereofshown herein, and that various deviations may be made therefrom withoutdeparting from the spirit and scope of the appended claim.

What is claimed is A film reel for motion picture apparatus comprisinappair of plates and a hub between sai wound thereon, one of said plateshaving a hole therein and the other of said plates having a cupintegraltherewith, pressed therefrom and inaxial alinement with thehole,

said hole and cup being adapted to'receive a spindle of motion pictureapparatus, said hole being formed for driving engagement with thespindle, and said cup'insurm applicati'on of the reel to the spindlewith the hole platein advance of the cup plate.

ARTHUR C. HAYDEN.

plates adapted to have a fi1m

